Coal-washer and ore-concentrator.



A. G. CAMPBELL. COAL WASHER AND ORE CONGENTRATOR.

APPLIOATION FILED JUNE 5, 1912.

Patented June 17, 1913.

3 SHEETSSHEET l.

INVENTOR Alonzo C. Cam

bell By M A TTOR/VE Y 8 A. c, CAMPBELL. COAL WASHER AND OREGONOENTRATOR.

APPLICATION FILED JUNE 5, 1912.

Patented June 17, 1913.

a SHEETS-SHEET 2.

OOOOOO OOOO Campbell IT. Hun. Irv-n WITNESSES Alonzo C.

ATTORNEYS COLUMBIA PLANoaRAPn 60.. WASHINGTON, D. c.

A. C. CAMPBELL COAL WASHER AND ORE GONUENTRATOR. APPLIGATION FILED JUNE5, 1912.

1,065,213, Patented June 17,1913.

3 SHEETS-SHEET 3.

Alonzo C. Campbell 77TWT N COLUMBIA PLANDGRAPH C0,, WASHINGTON, n. c.

ALONZO C. CAMPBELL, OF ASHEVILLE, NORTH CAROLINA.

COAL-WASHER AND OBE-CONCENTRATOB.

Specification of Letters Patent.

Patented June 17,1913.

Application filed June 5, 1912. Serial No. 701,788.

To all whom it may concern:

Be it known that I, ALoNzo C. CAMPBELL, a citizen of the United States,and a resident of Ashevill-e, in the county of Buncombe and State ofNorth Carolina, have invented a new and Improved Coal-Vasher and OreConcentrator, of which the following is a full. clear, and exactdescription.

The invention relates to coal washers and ore concentrators, such asshown and described in the Letters Patent of the United States, No.695,790, No. 835,397, and No. 898,314, granted to me on March 18, 1902,November 6, 1906 and September 8, 1908, respectively.

The object of the present invention is to provide a new and improvedcoal washer and ore concentrator arranged to prevent back sliding suchdensities of the material under treatment as should go forward, and toinsure the movement of all the material in the proper directions so thatthe capacity of the machine is increased as the working surface has agreat jigging and panning effect to hasten concentration and also tohasten on discharge of heads.

For the purpose mentioned use is made of a pan, means for oscillatingthe pan and imparting a percussive action to the same, the said panhaving a working surface made in sections inclined forwardly andclownwardly to cause the concentrates to flow by gravity forwardly tothe point of discharge while the tailings and water flow by gravityrearwardly into the tailings discharge.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure l is a sectional side elevation of the coal washer and oreconcentrator, the pan being shown in elevation; Fig. 2 is an enlargedsectional side elevation of the pan provided with one form of ritlles,the section being on the line 2-2 of Fig. 3; Fig. 3 is a plan view ofthe same; Fig. 4 is a sectional side elevation of the pan provided withanother form of riffies, the section being on the line 4E4C of Fig. 5;Fig. 5 is a plan view of the same; Fig. 6 is an enlarged cross sectionof the pan shown in Figs. 2 and 3, the section being on the line 66 ofFig. 2; and Fig. 7 is an enlarged cross section of the pan shown inFigs. 4 and 5, the section being on the line 7-7 of Fig. 4.

Successful operations of washers as heretofore constructed have beenbalked to a considerable xtent by the accumulation of a large body ofmaterial of different densities that would neither move one way nor theother or would travel forward and backward and never discharge either atthe head or the tail of the machine thus over-burdening the pan for nogood purpose. In order to overcome this difficulty and to insuremovement of all the material in the proper and desired direction andthus increase the working capacity of the machine is the main object ofthe improvements presently to be described in detail.

The pan A is hung on suspending rods B depending from the main frame Cof any approved construction, and the said pan A is provided with a headblock A adapted to bump against the bumping block D held on the mainframe C, and the said head block A is provided with a flange E connectedby a connecting rod F with the upper end of a forwarding lever Gcarrying at its lower end a friction roller G engaging the cam groove Hin a cam wheel H attached to the main driving shaft I journaled insuitable bearings on the main frame 0 and connected by pulleys and beltsor other devices with machinery for imparting a continuous rotary motionto the said shaft I. The detailed construction of the forwarding lever Gis approximately the same as the one shown and described in the LettersPatent of the United States, No. 695,790, above referred to, so thatfurther description of the same is not deemed necessary.

The pan A is constructed in detail as follows, special reference beinghad to Figs. 2 to 7. The head block A previously mentioned forms part ofa keel or a longitudinally-extending rib A cut out on the top in theform of saw teeth and similarly out side bars A on opposite sides of thekeel A formwith the latter a support for the bottom pieces A resting onthe inclined cut-out portions of the keel A and the bars A The forwardends of the bottom pieces A support cross bars to form barriers A Thesides A of the pan A are secured to the side bars A and the sides of thebottom pieces A, as will be readily understood by reference to Fig. (3.On the inner faces of the barriers A and resting on the bottom pieces A.are secured transwerse strips J, and triangulanshaped strips J extendlongiti'ldiimlly long the sides It oi the pan and likewise rest on thelottoin pieces it. The strips J and J lorin supports for the forwardends of the sides oi screens hi, K passing at their rear ends to therear ends of the bottom pieces ft. thins twining with the latter andwith the barriers A hutch pockets L from which lead openings N forn'iedin the cross strips J and the harriers The foremost bottom piece A isinclined in the reverse direction to the bottom pieces A", that is, thelatter are inclii'ied forwardly and downwardly while the front or headbottom piece It is inclined downwardly and rearwardly, and the screen Koverlying this upper bottom piece It is inclined downwardly andrearwardly in contradistinction to the forward and downward inclinationof the other screens K. fin apertured barrier A1 is arranged on theforward end of the head bottom piece A and a similar barrier A isarranged on the rear end of the lastbottoin piece A for the passage ofthe tailings from the pan A, hereinafter more fully explained. Thescreens K and K are prefenbly constructed with meshes graduallyincreasing in size from the tail end of the pan to the head end thereif,as plainly indicated in Figs. 3 and Ti ithin the pan A. are arrangedtransversely-eXtending' perforated ritl'les inclined forwanlly anddowrnvardly, and each tern'iinating at its forward end in a tlap valve6, riveted or otherwise secured to the body of the ril'lles O, the .trceend of the tap valve O resting on the .cm'responding screen h. or K andat a point intermediate the ends thereof. The sides of each ri'tlie Oare bent around longitudinally-extending rods O having rearwardly-eurvedspring extensions terminating in eyes 0* engaged by bolts P heldt1.'.11iSYO1SGl in the s s A of the pan A, as plainly shown in 6. By thearrangement described the ritl'les O are tree to swing up or down owingto the spring extensions 0 permitting the supporting" rods 0' for theritl'les O to flex. By thi use of the spring extensions U a tensionresistance is provided for Qttjlfl rillle O to hold the latter againstthe free upward swinging movement. that is, to hold the lap valves Owith a desired force in contact with the screens K.

In the niiodified form of rillles shown in Figs. 1-, and '5, each rillleis made in sections ar'anged one alongside the other in a transversediretion, and each terminating at its rear upper end in an eye U throughwhich extends a rod P which extends tl'irough the sides ii of the panand is fastened thereto by nuts P By the arrangement described. thesectiois o'li each rillie 0" are free to swing iip or down one incependent of the other instead of the entire ritllc t) swinging up anddown. The cinistruction of the pan provided with the ritlies U is thesame as above described in reference to the ril'lles 0, so that further(ilescription of the modified form shown in Figs. 4, 5 and 7 is notdeemed necessary. The material to be tr lated is placed into a hopper Qmminted on the frame C and ha ving an. outlet spout Q. provided with apivoted tilter Q for delivering the material to the pan A, preferablyone-third of the distance from the head of the pan 4%.. A water supplypipe it connected with a suitable source of water is provided at itsoutlet with a spreader R cdistribute the wate at the head of the pan A.A portion of the water is also passed by branch pipes R to the hopper(.1. T he material passing out of the end of the pan A. drops int i asluice S while the railings pass over the tail end of the pan A and dropinto a railings sluice T. both sluices S and T be ing mounted on themain frame C.

ll hen the machine is in operation the pan A is oscillated and receivesr percussive action by the mechanism shown and described, and by thisaction of the pan the more do: stu'tt is a used to settle to the bottomand to adhere with some degree of persistency to the fixed screens K. Atthe head of each hutch pocket L nearest the barrier A the How orbuoyancy of the material is greatest, diminishing rapidly anddisappearing at the tail or rear end of each individual pocket L, withthe general etteet to gradually enrich the overlying bed of material asthe latter travels :torward on each individual screen K. The actiondescribed is the first step in the process of concentration. The moremassive bed of the dense stuff or taat which clings more persistently tothe screens K bumps forward uninterruptedly, and passes under theswinging ri es, trap-like, and onto another series of riltles (l. morepersistently massive toward the headdischarge. Portions of the feedstuitl of liner grain. and less dense undergoes more or less of" overand under circuitous How and diiltusion with the water. It will notcling so pers stently to the screens. At this juncture, the perforateswinging ritlles O come into play :to arrest the too precipitate flow ofthe diffused mass. fi edimcntm tion will take place on the incliningareas,

and the buoyant cite-ct of this water interm! cntly lurched through thepr: areas will cause a second or a re-washing ot the material,peculiarly modified, as will appear presently. The line dense straitpasses through the perforations oil? the ri tiles O and in tcrmii'iglesand nnsses with the under trend accumulating from riftle to riflie andfinally discharging at the head. That portion that cannot go through theperforations, being too large or too light, is jigged to that extentthat the light stuff, coal or gangue, drifts with the water to the tailend of the machine and discharges over the barrier A" into the tailingssluice T. That part of the material which is more dense moves down theinclined riftles O by the fourfold effect produced, first, by gravity,second, by impact; third, by the buoyancy of the water flowing upthrough the perforations of the ritlles; and, fourth, by the lo-dgmentfrom the water filtering back through the perforations instead ofoverflowing the upper ends of the ritlles. The latter action seems to bethe most effective to prevent backsliding, which is most damaging inwashers as heretofore constructed. The fourfold effect referred to, toretard backsliding of such densities as should go promptly to the head,constitutes the main feature of the present improvement, it beingunderstood that the capacity of the machine, particularly on fine stuff,is twofold with greater enrichment of headings and of tailings of ore orof coal. It will also be noticed that the working sur face has greatjigging and panning effect to hasten concentration and also to hastenprompt discharge of headings. Owing to the many safeguards againstbacksliding of the values, the pan A may have much greater inclinationor a fall, thus favoring a more rapid discharge of the tailings.

The flap valve 0 on the lower margin of each riiii-e O forms a safeguardto prevent back flow of the water under the corresponding riffle, andthe flap valve also serves as a favorable lodgment for the line densestuff that would otherwise be buoyed by the too violent upflow and theuplift of the rittle at each bump of the pan. The flap valve also servesto hold down the spacing under the ritlie to the most suitable gage bythe weight of the superincumbent mass that is not dif fused by thewater.

By using multiple riftles more pliability is given to the machine andthe latter is adapted to handle very fine material, that is, such thatthe weight of the riflle is sufficient to hold it down to the propergage, and in the event of the bed compacting more in one place or on oneside than on another.

The head pocket of the pan is slightly different from the other pockets,as above described and shown in Figs. 2 and t. The intention of theslight rise in the grade of the working surface, at the head of the panis to float the water back from the head discharging mass, that it maybe practically free from water, thus giving it greater impetus ofdischarge; and, too, the back wash makes it much cleaner, it beingunderstood that solid matter has near double the clinging power, oradhesiveness when not submerged.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A machine of the class described provided with apan, and means for oscillating the pan and imparting percussive actionto the same, the said pan being provided on its bottom with pocketshaving screens at the tops, and transversely-extending swinging rittlesinclined forwardly and down wardly and fulcrumed at their rear elevatedends, the free forward ends of the swinging ri'lfles resting on the saidscreens intermediate the ends thereof.

A machine of the class described provided with a pan, and means foroscillating the pan and imparting percussive action to the same, thesaid pan being provided on its bottom with pockets having screens at thetops, the forward end of each of the pockets being in the form of abarrier, and transversely-extending swinging ritlies inclined forwardlyand downwardly and fulcrumed at their rear elevated ends, the freeforward ends of the swinging ritlies resting on the said screensintermediate the ends thereof.

3. A. machine of the class described provided with a pan, and means foroscillating the pan and imparting percussive action to the same, thesaid pan being provided on its bottom with pockets having screens at thetops, the bottoms of the pockets and their overlying screens beinginclined forwardly and downwardly and the forward end of each pocketbeing in the form of a barrier, and transversely-extending swingingri'tlies inclined forwardly and downwardly and fulcrumed at their rearelevated ends, the free forward ends of the swinging ritfles resting onthe said screens intermediate the ends thereof.

at. A machine of the class described provided with a pan and means foroscillating the pan and imparting percussive action to the same, thesaid pan being provided on its bottom with pockets having jig screens atthe tops, the bottom of the head pocket having an approximatelyhorizontal bottom and the screen of this head pocket being inclinedrearwardly and downwardly, and the bottoms of the remaining pockets andthe Overlving screens of these pockets being inclined forwardly anddownwardly, the forward ends of the several pockets being in the form oftransverse barriers having openings, and transversely-extending swingingrifiies in clined forwardly and downwardly and fulcrumed at their rearelevated ends, the free forward ends of the swinging riltles resting onthe said screens intermediate the ends thereof.

5. A machine of the class described provided with a ,pan and means foroscillating the pan and imparting percussive action to the same, thesaid pan being provided on its botton'i with pockets having jig screensat the tops, transversely-extending swinging riliies inclined forwardlyand downwardly and it'u'lcruinml at their rear elevated ends, the treeforward ends of the swinging ritlles resting on the said screensintermediate the ends tl-iercot. the riilles being supported by aid ofside rods, said side rods having rear ends terinimiting in eyes, andpivots secured to the sides of the pan and engaged by the said eyes.

(3. A machine of the class described provided with a pan and means foroscillating the pan and inipaiiting percussive action to the same, thesaid pan being provided on its bottom with pockets having screens at thetops, the screens having meshes gradually increasing in size from thetail of the machine to the head thereof, and transversely-extendingswinging ritli-es inclined forward and downwardly and fulcrunied attheir rear elevated ends, the free forward ends of the swinging ritl'lesresting on the said screens intermediate the ends thereof.

7. A machine of the class described provided with a pan and means foroscillating the pan and imparting a percussive action to the same. thepan being provided with swinging ritlles inclined downwardly and.forwardly toward the head of the pan. each rittle having a tensionresistance against upward swinging of the ritlie.

8. A machine of the class described provided with a pan and means foroscillating the pan and imparting percussive action to the same, thesaid pan being provided on its bottom with pockets having screens at thetops, the bottom of the head :pockct having an approximately horizontalbottom and the screen of this head pocket being inclined rearward'ly anddownwardly, and the bottoms of the remaining pockets and the oven lyingscreens of these pockets being inclined forwardly and downwardly, theforward ends of the several pockets beingin the form of transversebarriers having openings.

S). A. machine of the class described provided with a. pan and means foroscillating the pan and imparting percussive action to the same, thesaid pan being provided on its bottom with pockets having screens at thetops, the bottom ot the head pocket having :av substantially horizontalbottom and the screen of this head pocket being inclined rearwardly anddownwardly and the bot toms of the remaining pockets and the overlyingscreens of these pockets being inclined forwardly and downwardly, thebarrier bounding one side of the head pocket extending above and belowthe adjacent end 01. the pocket being provided with a discharge openingat right angles to said barrier.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALGNZO C. CAMPBELL. lVitnesses:

Vomvo L. Gnnonn, LUG] LE CAM rnnnn.

Copies of this patent may be obtained. for five cents each, byaddressing the Commissioner of Patents,

